/**
* Creates an empty page label dictionary for the given document.
*
* <p>Note that the page label dictionary won't be automatically added to the document; you will
* still need to do it manually (see {@link PDDocumentCatalog#setPageLabels(PDPageLabels)}.
*
* @param document The document the page label dictionary is created for.
* @see PDDocumentCatalog#setPageLabels(PDPageLabels)
*/
public PDPageLabels(PDDocument document) {
labels = new TreeMap<Integer, PDPageLabelRange>();
this.doc = document;
PDPageLabelRange defaultRange = new PDPageLabelRange();
defaultRange.setStyle(PDPageLabelRange.STYLE_DECIMAL);
labels.put(0, defaultRange);
}
public String next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
StringBuilder buf = new StringBuilder();
if (labelInfo.getPrefix() != null) {
String label = labelInfo.getPrefix();
// there may be some labels with some null bytes at the end
// which will lead to an incomplete output, see PDFBOX-1047
while (label.lastIndexOf(0) != -1) {
label = label.substring(0, label.length() - 1);
}
buf.append(label);
}
if (labelInfo.getStyle() != null) {
buf.append(getNumber(labelInfo.getStart() + currentPage, labelInfo.getStyle()));
}
currentPage++;
return buf.toString();
}
